CVE-2005-4670: Cross-site scripting (XSS) vulnerability in message.php in CityPost Automated Link Exchange (LNKX) allows remo

Routine

MEDIUM 4.3DOWNGRADE

CVE-2005-4670 is a medium-severity flaw (CVSS 4.3) affecting php lnkx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in message.php in CityPost Automated Link Exchange (LNKX) allows remote attackers to inject arbitrary web script or HTML via the msg parameter.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Published	2005-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: citypost

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:19 UTCUpdated Record last modified

citypost php lnkx DOWNGRADE

Affected: 52.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 52.0

1. Check installed version

apt-cache policy php-lnkx || rpm -q php-lnkx || php-lnkx --version

2. No fixed release: DOWNGRADE to a release before 52.0 (Debian / Ubuntu)

apt-cache madison php-lnkx sudo apt install php-lnkx=<VERSION_BEFORE_52.0> sudo apt-mark hold php-lnkx

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list php-lnkx sudo dnf downgrade php-lnkx-<VERSION_BEFORE_52.0> sudo dnf versionlock add php-lnkx

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: CityPost PHP LNKX 52.0 - 'message.php' Cross-Site Scripting

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2005-4670?

php lnkx: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-4670 being exploited?

CVE-2005-4670 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2005-4670 affect?

CVE-2005-4670 affects php lnkx. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in message.php in CityPost Automated Link Exchange (LNKX) allows remote attackers to inject arbitrary web script or HTML via the msg parameter.

How urgent is CVE-2005-4670?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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